Astronomy and Astrophysics – Astrophysics
Scientific paper
2007-09-04
AIP Conf.Proc.948:165-169,2007
Astronomy and Astrophysics
Astrophysics
Conference proceeding for poster at conference "Unsolved problems in Stellar Physics"
Scientific paper
10.1063/1.2818966
Turbulent motions in the interior of a star play an important role in its evolution, since they transport chemical species, thermal energy and angular momentum. Our overall goal is to construct a practical turbulent closure model for convective transport that can be used in a multi-dimensional stellar evolution calculation including the effects of rotation, shear and magnetic fields. Here, we focus on the first step of this task: capturing the well-known transition from radiative heat transport to turbulent convection with and without rotation, as well as the asymptotic relationship between turbulent and radiative transport in the limit of large Rayleigh number. We extend the closure model developed by Ogilvie (2003) and Garaud and Ogilvie (2005) to include heat transport and compare it with experimental results of Rayleigh-Benard convection.
Garaud Pascale
Miller Neil
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